The Effect of Environment on the Stress-Rupture Properties of Metals at Elevated Temperatures

Stress-rupture tests in controlled atmospheres have been made with low-carbon steels and with Hastelloy “C.” Small differences in the composition of environment produced relatively large differences in the amount of intergranular cracking and in the time to failure. Attention is called to the need for making stress rupture tests of metals in environments similar to their service conditions.